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<title>Implementation Details (The C Preprocessor)</title>

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<h2 class="chapter" id="Implementation-Details-1"><span>11 Implementation Details<a class="copiable-link" href="#Implementation-Details-1"> &para;</a></span></h2>

<p>Here we document details of how the preprocessor&rsquo;s implementation
affects its user-visible behavior.  You should try to avoid undue
reliance on behavior described here, as it is possible that it will
change subtly in future implementations.
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<p>Also documented here are obsolete features still supported by CPP.
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